Seinfeld, Jerry Syllabification: (Sein·feld, Jerry)Pronunciation: /ˈsīnˌfeld/Entry from US DictionaryDefinition of Seinfeld, Jerry (1955-) US comedian and actor. He starred in the television sitcom Seinfeld (1989–98). Seinfeld, Jerry in other Oxford dictionaries Definition of Seinfeld, Jerry in the US English dictionary